Some players are lured by the appeal of stardom; for others, it just takes a whiff of a few extra £££ in their pocket to make them move club.
Even, if that club is a rival to your current club.
The following five players have all made that controversial move across the country - even in some cases across a city - to attempt to further their career, and they've received their fair share of criticism for doing so.
Scroll through the pages to see arguably the five biggest traitors in recent times in the Premier League - and comment below any other players that have done the same!
Write for GiveMeSport! Sign-up to the GMS Writing Academy here: http://gms.to/1a2u3KU
DISCLAIMER: This article has been written by a member of the GiveMeSport Writing Academy and does not represent the views of GiveMeSport.com or SportsNewMedia. The views and opinions expressed are solely that of the author credited at the top of this article. GiveMeSport.com and SportsNewMedia do not take any responsibility for the content of its contributors.